title: Giant cell tumor of the tendon sheath treated by brachytherapy (surface mold) technique-A technical illustration.
abstract: BACKGROUND
  Giant cell tumors of the tendon sheath (GCTTS) are rare tumors involving diverse locations and have a tendency to recur postoperatively. Hence, radiotherapy (RT) plays a pivotal role as an adjuvant modality to prevent local recurrences. Although RT is an attractive treatment modality, treating these tumors in complex anatomical locations, such as the thumb with external beam radiation (EBRT), and ensuring adequate dosimetric coverage can be challenging. Literature regarding the optimal RT technique to treat GCTTS is limited in view of the rarity of these lesions and their complex anatomical locations. In this report, we describe a case of GCTTS of the thumb treated successfully with surface mold radiotherapy using a customized thermoplastic mold for the thumb. The patient tolerated the treatment well with excellent local control and functional outcome.
  
  
  METHODS
  We developed a brachytherapy mold technique using a customized thermoplastic thumb mold with interstitial catheters and irradiated the target volume homogeneously using microselectron iridium-192 high-dose-rate (Nucletron B.V., Veenandaal, The Netherlands) sources.
  
  
  CONCLUSIONS
  The index patient treated with surface mold therapy illustrates that this technique is safe and practical method to achieve excellent local tumor control with good functional outcome.
authors.affiliation: Department of Radiation Oncology and Medical Physics, Kailash Cancer Hospital, Vadodara, Gujarat, India. jastri@rediffmail.com
authors.forename: Jayant Sastri
authors.initials: JS
authors.lastname: Goda
authors.forename: Pramod
authors.initials: P
authors.lastname: Patil
authors.forename: Chokkalingam
authors.initials: C
authors.lastname: Krishnappan
authors.forename: Dooraisamy
authors.initials: D
authors.lastname: Elangovan
mesh_terms: D001918:Brachytherapy / Q000295:instrumentation / Q000379:methods*; D005260:Female; D005870:Giant Cell Tumors / Q000532:radiotherapy*; D006801:Humans; D007496:Iridium Radioisotopes / Q000008:administration & dosage; D008875:Middle Aged; D012878:Skin Neoplasms / Q000532:radiotherapy*; D013583:Synovial Membrane / Q000528:radiation effects*; D013710:Tendons; D013933:Thumb
chemical_list: D007496:Iridium Radioisotopes